Abstract:
:The complement system is an important immunosurveillance mechanism against tumors, and complement factor H (CFH) is a key regulator for activation of the complement system. Expression of complement factor H has been demonstrated in cell lines from several malignancies. In this study we examined the contribution of the single-nucleotide polymorphism (SNP) Try402His (Y402H) (rs1061170) in the CFH gene to the risk of lung cancer in a case-control study with 1000 cases and 1000 controls. Odds ratios (ORs) and 95% confidence intervals (CIs) were computed by logistic regression. The frequencies for CFH Y402H genotypes among the cases were statistically significantly different from those among controls (χ(2)=8.66, P=0.003), with 402His/His or 402His/Try genotypes being over-represented among patients compared with controls (13.6% versus 9.4%, P<0.004). A multivariate regression analysis showed that a significantly increased risk of lung cancer for the 402His/His or 402His/Try carriers with OR (95% CI), 1.50 (1.12-2.00). When stratified by smoking status, the elevated risk of the cancer associated with variant CFH genotypes was observed among smokers, but not among non-smokers. When analyzed with cumulative smoking dose (pack-years), a super-multiplicative interaction was observed at different smoking levels. Among carriers with the 402Tyr/His or His/His genotype, the ORs of developing lung cancer for smoking<16, 16-28, or >28 pack-years were 0.98 (0.49-1.94), 2.36 (1.14-4.90), and 6.39 (3.49-11.68), respectively. These findings suggest that CFH Y402H polymorphism may interact with cigarette smoking to effect the development of lung cancer in the Chinese population.
journal_name
Cancer Epidemioljournal_title
Cancer epidemiologyauthors
Zhang Z,Yu D,Yuan J,Guo Y,Wang H,Zhang Xdoi
10.1016/j.canep.2011.11.004subject
Has Abstractpub_date
2012-04-01 00:00:00pages
e111-5issue
2eissn
1877-7821issn
1877-783Xpii
S1877-7821(11)00178-0journal_volume
36pub_type
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